/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInterface.h
Get the value of the given static component mask parameter
True if successful
bool GetStaticComponentMaskParameterValue ( const FHashedMaterialParameterInfo & ParameterInfo, bool & R, bool & G, bool & B, bool & A, [FGuid](API\Runtime\Core\Misc\FGuid) & OutExpressionGuid, bool bOveriddenOnly ) const